Fix error checking in mysqlnd

Closes phpGH-11925

Author: kamil-tekiela

NEWS

@@ -14,8 +14,34 @@ PHP                                                                        NEWS
     are passed in. (Derick)
 
 - DOM:
-  . adoptNode now respects the strict error checking property. (nielsdos)
-  . Align DOMChildNode parent checks with spec. (nielsdos)
+  . Fix DOMEntity field getter bugs. (nielsdos)
+  . Fix incorrect attribute existence check in DOMElement::setAttributeNodeNS.
+    (nielsdos)
+  . Fix DOMCharacterData::replaceWith() with itself. (nielsdos)
+  . Fix empty argument cases for DOMParentNode methods. (nielsdos)
+  . Fixed bug GH-11791 (Wrong default value of DOMDocument::xmlStandalone).
+    (nielsdos)
+  . Fix json_encode result on DOMDocument. (nielsdos)
+  . Fix manually calling __construct() on DOM classes. (nielsdos)
+  . Fixed bug GH-11830 (ParentNode methods should perform their checks
+    upfront). (nielsdos)
+  . Fix segfault when DOMParentNode::prepend() is called when the child
+    disappears. (nielsdos)
+
+- FFI:
+  . Fix leaking definitions when using FFI::cdef()->new(...). (ilutov)
+
+- MySQLnd:
+  . Fixed bug GH-11440 (authentication to a sha256_password account fails over
+    SSL). (nielsdos)
+  . Fixed bug GH-11438 (mysqlnd fails to authenticate with sha256_password
+    accounts using passwords longer than 19 characters).
+    (nielsdos, Kamil Tekiela)
+  . Fixed bug GH-11550 (MySQL Statement has a empty query result when
+    the response field has changed, also Segmentation fault).
+    (Yurunsoft)
+  . Fixed invalid error message "Malformed packet" when connection is dropped.
+    (Kamil Tekiela)
 
 - Opcache:
   . Avoid resetting JIT counter handlers from multiple processes/threads.

ext/mysqlnd/mysqlnd_protocol_frame_codec.c

@@ -202,6 +202,7 @@ MYSQLND_METHOD(mysqlnd_pfc, send)(MYSQLND_PFC * const pfc, MYSQLND_VIO * const v
 	if (bytes_sent <= 0) {
 		DBG_ERR_FMT("Can't %zu send bytes", count);
 		SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
+		bytes_sent = 0; // the return type is unsigned and 0 represents an error condition
 	}
 	DBG_RETURN(bytes_sent);
 }